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chromium/third_party/blink/web_tests/external/wpt/navigation-api/navigation-history-entry/entries-after-blank-navigation-from-cross-origin.html 

<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/get-host-info.sub.js"></script>
<body>
<script>
promise_test(async t => {
  await new Promise(resolve => window.onload = () => t.step_timeout(resolve, 0));

  let i = document.createElement("iframe");
  i.src = get_host_info().HTTP_ORIGIN_WITH_DIFFERENT_PORT + "/common/blank.html";
  document.body.appendChild(i);
  await new Promise(resolve => i.onload = () => t.step_timeout(resolve, 0));

  i.contentWindow.location = "about:blank";
  await new Promise(resolve => i.onload = resolve);
  let entries = i.contentWindow.navigation.entries();
  assert_equals(entries.length, 1);
  assert_equals(entries[0].url, "about:blank");
}, "entries() should not be leaked from cross-origin when navigating to about:blank");
</script>
</body>